If there is a Super League, no team should have relegation invincibility. You win the National League, you go to the Super League. The idea does sound good but will actually be very bad. Besides, we already have the UCL and the UEL.

I don't know what else Infantino has been up to but it was part of his job to be involved in the FFP settlement negotiations. Settlements that other clubs could challenge if they felt them too lenient - non did.
The pejorative writing style of these articles, which are based upon illegal hacking, makes it difficult to know where the journalism begins and the tabloid ends.
As Gab Marcotti has pointed out, there's nothing new about any of the above FFP or ESL stuff. Interesting to see some of the hacked emails but in general all a bit of a damp squib, despite how it's being sold by DS

On the topic of cleaning up football, it should be noted that Football Leaks itself is far from clean. There have been plenty of articles in the past highlighting their/his attempts at blackmail - Doyen Sports, for example, where emails showing the attempted blackmail were ...leaked.
It's also obvious that they rely on massive hacking, you don't get terabytes of data from all corners of the globe via genuine sources. And this matters because it's almost certainly inadmissible in court so if your goal is to clean up football the data likely should have been handled differently.